2268891990 has 48 divisors (see below), whose sum is σ = 6036318288. Its totient is φ = 590966208.

The previous prime is 2268891979. The next prime is 2268892019. The reversal of 2268891990 is 991988622.

2268891990 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289269 + ... + 297008.

It is an arithmetic number, because the mean of its divisors is an integer number (125756631).

Almost surely, 2^2268891990 is an apocalyptic number.

2268891990 is an abundant number, since it is smaller than the sum of its proper divisors (3767426298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2268891990 is a wasteful number, since it uses less digits than its factorization.

2268891990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586333 (or 586330 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 2268891990 is about 47632.8876932734. The cubic root of 2268891990 is about 1314.0279630976.

The spelling of 2268891990 in words is "two billion, two hundred sixty-eight million, eight hundred ninety-one thousand, nine hundred ninety".